Safety 15
Grounding safety rules for electricians
• Comply with all relevant electrical safety regulations of the installation country or
region.
• Always connect protective earth (PE) to the inverter and associated equipment to
ensure personal safety and electromagnetic compatibility.
• Ensure that grounding connections are sized to meet safety regulations.
• Chaining is not allowed. In multi-inverter installations, connect each inverter to the
protective earth (PE) of the distribution board separately.
• Never ground the DC+ or DC- live conductors.
Notes:
• PVS300 is a transformerless inverter; the DC side and AC grid are not
galvanically separated. Therefore the inverter must not be used with solar
modules which require DC+ or DC- conductor grounding.
• The inverter has two protective earth terminals which are:
- a screw terminal connection inside the AC connector
- a PE screw for a cable lug connection to the right side of the AC connector.
• As the touch current of the inverter may be higher than 3.5 mA AC or 10 mA DC in
case of failure of the protective earthing conductor, a fixed protective earth
connection is required. See Selecting the power cables on page 37.
General safety
WARNING! Ignoring the following instructions can cause injury or death, or
damage to the equipment.
• The inverter is not field repairable. Never attempt to repair a malfunctioning unit;
contact your supplier, local ABB representative or Authorized Service Center for a
replacement.
• Protect the inverter so that dust from drilling cannot enter it during installation.
Electrically conductive dust inside the unit may cause damage or malfunction.
• The inverter is heavy and should be lifted by two persons wearing appropriate
personal protective equipment.
• Choose an installation location where audible noise from the inverter(s) is least
likely to disturb people.
• Do not obstruct the inverter cooling air inlets and outlets. The mounting plate is
designed to maintain a small gap between the inverter body and the wall.
Safe start-up and operation
These warnings are intended for everyone involved in planning the operation, start up
or operation of the inverter.
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